Steam-pipes for articulated locomotives.



C. J. ME LLIN c W. L. REID. STEAM PIPES FOR ARTICULATED LOGOMOTIVES.

APPLICATION FILED SEPT. 29, 1910.

Patented Dec. 13, 1910.

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Ulli! WITNESSES:

C. J. MELLIN & W, L. REID.

STEAM PIPIssA FOR ARTICULATBD LocoMoTIvBs.

t APPLICATION FILED SEPT. 29, 1910. y 978,323. Patented Dec. 1s, 1910.

C. J. MELLIN n W. L. REID.

STEAM PIPBS FOR ARTICULATEDy LOGOMOTIVES. v

APPLICATION num szr'r. '29, 1910.

Patented Dec. 13, 1910.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

CARL J. MELLIN AND WILLIAM L. REID, F SCHENECTADY, 'NEW YORK.

STEAM-PIPES FOR ARTICULATED LOCOMOTIVES.

Specification of Letters Patent.-

Patented lDec. 13, 1910.

Application tiled September 29, 1910. Serial No. 584,461.

To all whom it may concern.-

. Be it known that we, CARL J. MELLIN and WILLIAM L. REID, both of Schenectady, in the county of Schenectady andState of .New York, have invented a certain new and useful Improvement in Steam-Pipes for Articulated Locomotives, of which improvement thevfollowing `is a specification.

' Our invention relates to locomotives of the articulated or Mallet type, in which, by

' reason of the comparatively great length of y compound locomotive, with the main steam supply' pipe, by which the objections to i l the present constructions, diz: unduly great length of branch steam pilpes, exposure of large area to; atmospheric cooling action, obstruction of ythe view of the'` engineman, and undesirable appearance, willbe eliminated.

The improvement claimed is hereinaften fully set forth. 1

In the accompanyin drawings: Figure 1 is a diagrammatic si e view of an articulated compound loc'omotivei illustrating an application ',of our inventiori; Fig. 2, a partial side view, in elevatiomlon an enlarged scale; Fig. 3, a Vertical transverse section through the steam pipes and high pressure cylinders; Fig. 4, a vertical section, on a further enlarged scale, through a pipe joint;

Fig. 5, a transverse section through the same;

and, Figs. 6 and 7, views similar, respectively, to those of Figs. 4 and 5,' but showing a structural modification.

In locomotives of the typrle to whichl our invention relatcs, it has, prior thereto, been the practice to supply the valve chests of the high pressure.cylinders with steam either throughh'ranch pipes leading from a throttle chest in lthe dome to the valve chests, entirely exterior to the boiler, or from a T head in the smoke box, conpected with the main steam supply pipe or dry pipe,through horzfmtal pipes extendingfrearwardly below .and on opposite sideqi of the boiler.

y Each of these plans iuvolues the objection of exposing the surfaces oi almost the entire length pf the branch steam pipes to the cooling action of the atmosphere, and that first specified is further objectionalile in the particular that the view of the engineman is obscured by the projection of the right hand pipe over the boiler, and these projecting pipes, moreover, impair the neat and good mechanical appearance of the locomotive.

Our invention, by which, it will be seen, the objections above stated are obviated, is herein exemplified as applied in a locomotive engine of the Mallet articulated compound type, comprising a rear frame, 8, supported on a plurality of driving wheels, 1, vand a trailing truck, 1", and a front frame, 8, supported on a plurality of driving wheels, l, and a leading truck, 9.. Therear frame, as in the regular practice in locomotives of this type, carries at its `front end, which is located nearly at the middle of the lenvth of the boiler, a pair of high pressure cylin ders, 12, the pist-ons of which are coupled to crank pins on the driving wheels, 1, and the front frame carries a pair of low pressure cylinders, 1Q', the pistons of which are coupled to crank pins on the driving wheels, 1E. The boiler, 4, is fixed to the rear frame, 8, and the front and rear frames are coupled, in the longitudinal central plane of the locomotive, by a pivot pin, 8*', the forward portion ofthe boiler being thus, as is characteristic in locomotives of this type, free to swing or traverse laterally, relatlvely to the front frame, S, in passing curves.

In the practice of our invention, the valve chests, 12b, of the high pressure cylinders, are connected with the main steam supply pipe, 61, which leads from a throttle valve chamber, 42, of any suitable and preferred construction, located in the dome, 41, of the boiler, in the following manner. The steam supply pipe, G1, is bifurcated at its lower end, and an internal branch steam pipe section, G3, is vconnected to cach side, ball joint rings,l6, of ordinary constructiombeing interposed between the pipes Gl and 62. The branch steam pipe sections, G3, are supported, near their upper ends, on brackets, 63a, secured to the inside of the shell of the boiler, 4, and extend downwardly within the boiler, following substantially the curva ture o't' the shell and being flattened toward their lower ends to clear the outer rowsl of the boiler tubes, 4, to as low a level in the boiler as may be conveniently practicable.

The lower ends of the nternhl branch steam pipe sections, (33, are suitably connect- Plates, 4S, are secured to the shell of the boiler, around the openings therein at the junction of the internal and externall branch steam pipe sections, in order to provide firm supportat tiose points, and bearings for ball joint rings interposed between the internal and external pipe sections. Elbows, 65, are secured to the upper ends of the external pipe sections, and as shown in Figs. 3 and 6, ball joint rings, 66, having opposite convex spherical faces, are interposed between corresponding faces on the elbows, 65, and plates, as, and are held in position by bolts, 6G", having heads, 66, bearing on internal shoulders in the pipe sections, 63, and nuts, 6G, engaging threads on the outer ends of the bolts. Similar ball joint rings, 66, are interposed between the inside of the boiler shell and the lower ends of the internal pipe sections, G3, which are held to a tight bearing on the boiler shell by the nuts, 66d, when tightened on the bolts.

The construction shown in Figs. t and 5, accords, in all substantialparticulars, with that just described, differing therefrom structurally in that a single ball joint ring, 66e, having a concave spherical face on its outer side and a convex face on its inner side,

is substituted for the two rings, 66 and 66a,

and that no bearing for a ring on the inside of the boiler shell is provided. Ordinary ball joint rings, 65h, are fitted in the external pipe sections, 65, at their junctions with the high pressure valve chests, 12b.

lt will be seen vt-hat. the construction above described attains the advantages that the area of steam pipe surface exposed to the atmosphere is materially reduced; there is no projection of the steam pipes over the upper portion of the boiler, to obstruct the view of theengin'eman or mar the appearance of thc locomotive, and the connections of the several pipe sections may be made and maintained perfectly tight without interfering with the capability of readily detaching the sections whenever necessary or de'- sirable.

We claim as our invention and desire to secure by Letters Patent:

1. ln an articulated locomotive. the combination of a rear frame, a front 'trame coupled thereto, a plurality of driving wheels supporting each of said frames. a boiler fixed to the rear frame and projecting, with the `capacity of relativemovement, over the front frame, cylinders fixed to the rear frame and actuating` the ,driving wheels thereof, a main steam supply pipe within the boiler, internal branch steam pipo sections connected thereto and extending downwardly bctween the boiler shell and tubes, and external branch steam pipe sections extending from the internal sections to the valve chests of the cylinders.

2. In an articulated locomotive, the combination of a rear frame, a front frame coupled thereto, a plurality of driving wheels supporting eachA of said frames, a boiler fixed to the rear frame and projecting, with the capacity of relative movement, over the front .'frame, cylinders fixed to the rear frame and actuating the driving wheels thereof, a main steam supply pipe within the boiler, internal branch steam pipe sections connected there- -to and extending downwardly betweenthe boiler shell and tubes, external branch steam pipe sections extending from the internal sections to the valve chests of the cylinders, and means for permitting a limit/ed degree of movement of the external sections relatively to the internal sections. 1

3. In an articulated locomotive, the combi-l nation of a rear frame, a front frame cou,

pled thereto, a plurality of driving wheels'v c supporting each of said frames, a boiler fixed to the rear frame and` projecting, with the capacity of relative movement, over the front frame, cylinders fixed to the rear frame, and actuating the driving wheels thereof, amain steam supply pipe within the boiler, internal branch steam pipe sections connected thereto and extending downwardly between the boiler shell and tubes to openings in the lower portion of the shell, ball joint rings connected to the internal pipesections at said openings, and external branch steam pipe sections abutting against said rings and extending therefrom to the valve chests of the cylinders.

4i. 'In an articulated locomotive, the conibination of a rear frame, ay front frame coupled thereto, a plurality of driving wheels supporting each of said trames, a boiler fixed' to the rear frame and projecting, with the capacity of relative movement, over the front frame, cylinders fixed to the rear frame and actuating the driving wheels thereof, a'main` steam supply pipe section within the boiler,l internal branch steam pipe sections connected thereto and extending downwardly between the boiler shell and tubes to openings in the lower portion of the shell, bearing plates secured to the boiler shell around 'said openings, ball joint rings fitting in the ends of the internal sections, bolts connecting said rings andsections to the boiler shell, and exsaid rings and extending therefrom to the valve chests of the cylinders.

5. ln an articulated locomotive` the combination of a rear frame, a front frame coupled thcreto, a plurality of driving wheels supporting cach of said frames, a boiler fixed to tlu` rear frame and projecting, with the mtpacity of relative movement, over the front frame,.cylindcrs fixed tothe rear frame and l12a ternal steam pipe sections abutting againstr -actuating the driving wheels thereof2 a mein steam supply pipe wlthin the boiler, lnternal branch steam pipe sections connected thereto and extending downwardly between the boiler shell and tubes to openings in the 'lower portion of the shell, bearing plates secured to the boiler shell around said open ings, inner ball joint rings fitting between -the internal sections and the boiler shell,

outer ball joint rings iitting in the bearing plates, bolts connecting said inner and outer and extending therefrom to the valve chests 15 of the cylinders.

CARL J. MELLIN. WILLIAM L. REID.

Witnesses:

CHAs. J. ROGERS; 'FRANK H. SAUTER. 

